About Washers
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General Purpose Washers
Use these washers to evenly distribute the load under bolt or screw heads and nuts when fastening. They can also act as spacers.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
18-8 stainless steel and 17-7 PH stainless steel washers have good chemical resistance and may be mildly magnetic.
Zinc yellow-chromate and chrome-plated steel washers are corrosion resistant in wet environments.
USS washers generally have a larger ID and OD than SAE washers.
For technical drawings and 3-D models, click on a part number.
| For Screw Size  | ID | OD | Thick. | Hardness | Washer Designation | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 2 1/4" | 2.375" | 4.500" | 0.210" to 0.280" | Not Rated | __ | 1 | 000000000 | 000000 |
18-8 Stainless Steel | ||||||||
| 2 1/4" | 2.375" | 4.500" | 0.210" to 0.280" | Not Rated | __ | 1 | 000000000 | 00000 |
Zinc Yellow-Chromate Plated Grade 8 Steel | ||||||||
| 2 1/4" | 2.375" | 4.750" | 0.193" to 0.248" | Rockwell C38 | USS | 1 | 000000000 | 00000 |
USS Washers
USS washers generally have a larger ID and OD than SAE washers.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic. Zinc-plated steel washers are corrosion resistant in wet environments.
Hot-dipped galvanized steel washers are 10 times as corrosion resistant as zinc-plated washers.
Black corrosion-resistant-coated steel washers resist chemicals and withstand 1,000 hours of salt spray.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 2 1/4" | 2.375" | 4.750" | 0.193"-0.250" | Not Rated | __ | 1 | 000000000 | 000000 |
Zinc-Plated Steel | ||||||||
| 2 1/4" | 2.375" | 4.750" | 0.193"-0.248" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
Hot-Dipped Galvanized Steel | ||||||||
| 2 1/4" | 2.375" | 4.750" | 0.193"-0.248" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
Black Corrosion-Resistant-Coated Steel | ||||||||
| 2 1/4" | 2.375" | 4.750" | 0.193"-0.248" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 00000 |
Steel | ||||||||
| 2 1/4" | 2.375" | 4.750" | 0.193"-0.248" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
Washers for Structural Applications
Designed for use with structural screws, studs, and nuts, these washers are often used for construction and exterior building applications.
Hot-dipped galvanized washers are corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
Split Lock Washers
As a screw is tightened, these washers flatten to add tension to the joint, counteracting fatigue around the joint from small amounts of vibration. This makes them a common choice to prevent fasteners from loosening. However, they resist the least amount of vibration compared to other locking washers.
These washers are compatible with fasteners that have right-hand threads to prevent clockwise rotation. The uneven split ends bite into fasteners for a tight grip, but they won’t work with hardened surfaces. These washers hold better than curved or wave washers. They are not reusable after tightening.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
Washers that meet ASME B18.21.1 adhere to strict dimensional standards.
For technical drawings and 3-D models, click on a part number.
Wedge Lock Washers
These two-piece washers provide more locking power than split, tooth, and spring lock washers. Wedges on the inside lock the two pieces together, and serrations on the exterior grip surfaces to resist loosening from high vibration and shifting. Washers are reusable.
Zinc-flake-coated steel washers are corrosion resistant in wet environments.
316 stainless steel and zinc-flake-coated steel washers are comparable to NORD-LOCK® Series washers.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Washer Type | Hardness | Pkg. Qty. | Pkg. | |
Zinc-Flake-Coated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 2 1/4", M56 | 2.330" | 3.350" | 0.270"-0.290" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 000000 |